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Bioorg Med Chem Lett. 2006 Feb 15;16(4):943-8. Epub 2005 Nov 15.

Novel fluorescent labelled affinity probes for diadenosine-5',5'''-P1,P4-tetraphosphate (Ap4A)-binding studies.

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1
Imperial College Genetic Therapies Centre, Department of Chemistry, Flowers Building, Armstrong Road, Imperial College London, London SW7 2AZ, UK.

Abstract

Tandem synthetic-biosynthetic procedures were used to prepare two novel fluorescent labelled affinity probes for diadenosine-5',5'''-P1,P4-tetraphosphate (Ap4A)-binding studies. These compounds (dial-mant-Ap4A and azido-mant-Ap4A) are shown to clearly distinguish known Ap4A-binding proteins from Escherichia coli (LysU and GroEL) and a variety of other control proteins. Successful labelling of chaperonin GroEL appears to be allosteric with respect to the well-characterized adenosine 5'-triphosphate (ATP)-binding site, suggesting that GroEL possesses a distinct Ap4A-binding site.

PMID:
16297624
DOI:
10.1016/j.bmcl.2005.10.098
[Indexed for MEDLINE]
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